package com.ruoyi.gateway.handler;

import com.ruoyi.common.core.utils.ServletUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
import org.springframework.cloud.gateway.support.NotFoundException;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 网关统一异常处理
 *
 * @author ruoyi
 */
@Order(-1)
@Configuration
public class GatewayExceptionHandler implements ErrorWebExceptionHandler {
  private static final Logger log = LoggerFactory.getLogger(GatewayExceptionHandler.class);

  @Override
  public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
    ServerHttpResponse response = exchange.getResponse();

    if (exchange.getResponse().isCommitted()) {
      return Mono.error(ex);
    }

    String msg;

    if (ex instanceof NotFoundException) {
      msg = "服务未找到";
    } else if (ex instanceof ResponseStatusException) {
      ResponseStatusException responseStatusException = (ResponseStatusException) ex;
      msg = responseStatusException.getMessage();
    } else {
      msg = "内部服务器错误";
    }

    log.error("[网关异常处理]请求路径:{},异常信息:{}", exchange.getRequest().getPath(), ex.getMessage());

    return ServletUtils.webFluxResponseWriter(response, msg);
  }
}
